The digestive system in Meandrina is
(1) Digestion is extracellular only
(2) Digestion is intracellular only
(3) Digestion is both extracellular and intracellular
(4) Digestion absent as it is a parasite
Both polyp and medusa life forms are present in the life cycle of
(1) Obelia
(2) Physalia
(3) Aurelia
(4) Adamsia
The skeleton of corals is made up of
(1) Calcium silicate
(2) Calcium phosphate
(3) Hydroxyapatite
(4) Calcium carbonate
Which of the following group consists exclusively of cnidarians?
(1) Aplysia, Gorgonia, Spongilla, Hydra
(2) Hydra, pennatula, obelia, Echinus
(3) Hydra, obelia, adamsia, physalia
(4) Scypha, Hydra, adamsia, physalia
Ctenophora is an exclusively marine phylum, the other such phylum is
(1) Mollusca
(2) Echinodermata
(3) Porifera
(4) Coelenterata
Ctenophorans are commonly referred to as
(1) Flatworms
(2) Comb jellies
(3) Sea anemone
(4) Cnidaria
The number of ciliated rows present in Comb jellies are
(1) 8
(2) 6
(3) 4
(4) 9
The function of flame cells are
(1) Digestion and excretion
(2) Attachment and osmoregulation
(3) Anchorage and excretion
(4) Excretion and osmoregulation
Presence of flame cells is a characteristic feature of
(1) Nereis
(2) Taenia
(3) Hirudinaria
(4) Pheretima
Which of the following is not an excretory structure found in invertebrates?
1. Flame cells
2. Malpighian tubules
3. Nephridia
4. Kidney